Gardner Denver PUREAIR EWD99E, Руководство по эксплуатации и обслуживанию

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RO membrane
The operational live of the RO membrane also varies with the quality of the raw feed water. As a general
rule, it should be replaced every 1-2 years. Typical signs that the device is plugging up are a decrease of
clean water flow and a decrease of rejection of levels of compounds found in the site water. If rejection of
any compound falls below a 70% level consistently, the membrane should be replaced and so should the
sedimentation and carbon cartridges.
Whenever the rejection levels start decreasing below their minimum acceptable value, a fast-flush valve
(ll) is provided to temporarily increase the internal cleansing of the membrane and hopefully restore
membrane performance. If the fast-flushing procedure does not restore the rejection performance, than
the membrane must be replaced.
Replacing the RO membrane:
•
Turn off the valve (ff) feeding raw water to the RO system.
•
Open the raw and RO water test drains (gg, qq) to depressurize the water charge from the
reservoir (nn) and lines.
•
Disconnect the processed water line from the RO housing end cap via the quick disconnect
fitting.
•
Unscrew the end cap from the housing – reasonable force may have to be used.
•
Remove the used membrane and discard.
•
Lubricate two end o-rings with a coating of clean petroleum jelly.
•
Install the new membrane into housing with two o-rings end first.
•
Lubricate o-rings on membrane housing with a coating of clean petroleum jelly.
•
Thread the cap back on hand-tighten firmly.
•
Close the raw water test point.
•
Open the raw water shutoff valve. After a minute or so, a trickle of water should be coming
from the open RO water test drain, indicating the system is again producing water. Close
now the RO water test drain.
•
The water reservoir, at a minimum raw water pressure of 50 psig, will fill up in about 2 hours.